Hardly precision bearing points there..
On May 25, 2013 11:48 PM, "YES NOPE9" <yes@nope9.com> wrote:

> I was weighing pills and tried this setup to improve the scale sensitivit=
y.
> See photos here =3D=3D>
> https://plus.google.com/u/0/photos/102396176247280453443/albums/588215425=
1101853345?hl=3Den
> Max is 5000g says the scale legend.
> I put a hinge at one end of a bar and clamped it to a book.
> I put a styrofoam cup at the other end of the bar.
> I used a marker as a pivot point.   The bar does not touch anything else.
>
> #1  I used the tare function to zero the scale while the cup was at the
> end.
> #2  I measured in 9 pills and weighed them. ( 97 grams )
> #3  I added all the pills ( 90 ) and weighed them.  ( 969 grams )
>
> 969 /97 * 10 =3D .999   That was the best result I had.  My worst was 1.2=
8
> when I was measuring smaller pills.
>
> What would be sources of error ?
> #1       the scale     I did not use the calibrate function since I was
> doing ratio-metric comparisons.  Maybe cal would have improved things.
> #2      pressing on the hinge where it was clamped to the book changed th=
e
> amount measured.  I do not understand this.  I waited for the scale to
> settle down and it was still showing a reading as much as 5% off.
>
> As Napoleon Dynamite would say...... * You idiot*
>
> Gus                         keywords  99centech  99scale   99pills
>
>
>
> --
> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist
>
--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.